C++中的sizeof
时间：2011-06-09 来源：池塘里的潜艇
sizeof 返回一个对象或类型名的字节长度。
int *pi = new int[13];
cout << "pi:\t" << sizeof(pi) << endl;
cout << "*pi:\t" << sizeof(*pi) << endl;
string st1("fr");
string st2("a submarine");
string *ps = &st1;
cout << "st1:\t" << sizeof(st1) << endl;
cout << "st2:\t" << sizeof(st2) << endl;
cout << "ps:\t" << sizeof(ps) << endl;
cout << "*ps:\t" << sizeof(*ps) << endl;
cout << "short: \t" << sizeof(short) << endl;
cout << "short *:\t" << sizeof(short *) << endl;
cout << "shout &:\t" << sizeof(short &) << endl;
cout << "short[3]:\t" << sizeof(short[3]) << endl;
输出：
pi: 4 *pi: 4 st1: 32 st2: 32 ps: 4 *ps: 32 short: 2 short *: 4 shout &: 2 short[3]: 6
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